BIDIRECTIONAL SERVICE SYSTEM AND MULTIMEDIA CONTENT TRANSMISSION DEVICE

摘要

In an interactive service system (70), a service provider has an AV content creating/transmitting device (72) for transmitting AV content and an AV content related service providing device (75) for receiving a message, and a service requestor has an AV content reproducing device (74) for reproducing the AV content received from the AV content creating/ transmitting device (72) and then creating the message in accordance with sub-content of the AV content to transmit the message. The AV content creating/transmitting device (72) broadcasts AV data of the AV content via a relay station (13), while transmitting sub-content of the AV content via a network (16).